40540144 has 40 divisors (see below), whose sum is σ = 83275920. Its totient is φ = 19084800.

The previous prime is 40540141. The next prime is 40540147. The reversal of 40540144 is 44104504.

It is an interprime number because it is at equal distance from previous prime (40540141) and next prime (40540147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40540141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17959 + ... + 20089.

It is an arithmetic number, because the mean of its divisors is an integer number (2081898).

Almost surely, 2^40540144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40540144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41637960).

40540144 is an abundant number, since it is smaller than the sum of its proper divisors (42735776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40540144 is a wasteful number, since it uses less digits than its factorization.

40540144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209 (or 2203 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40540144 is about 6367.1142600082. The cubic root of 40540144 is about 343.5277005037.

Adding to 40540144 its reverse (44104504), we get a palindrome (84644648).

The spelling of 40540144 in words is "forty million, five hundred forty thousand, one hundred forty-four".